Liquid fuel burner and combustion apparatus



June 2, 1953 Y 5, CLARKE 2,640,320

LIQUID FUEL BURNER AND COMBUSTION APPARATUS Filed April 17, 1950Patented June 2, 1953 LIQUID FUEL BURNER AND COMBUSTION APPARATUS JohnStanley Clarke, Blacko, near Nelson, England, assignor to Joseph LucasLimited, Birmingham, England Application April 17, 1950, Serial No.156,461 In Great Britain May 23, 1949 2 Claims.

This invention has for its object to provide an improved liquid fuelburner adapted for use more particularly in the combustion chambers ofjetengines, gas turbines or the like.

The accompanying drawing is a sectional side elevation illustrating oneembodiment of the invention for use in a cylindrical combustion chambersurrounded by an air jacket.

Referring to the drawing, the nozzle is constructed from a pair ofcircular metal plates a, b of any convenient and suitable diameter. Theplate a is formed at one side with a hollow axial shank adapted to besecured to a perforated supporting plate (I at the entrance of thecombustion chamber. At the other side it is formed with a hollow centralboss 6 adapted to carry the second plate I). The adjacent faces of theplates are shaped to form a shallow chamber f to which vaporised fuelcan be supplied from a tube 9 having one end secured to the said boss.The plate a is of rather larger diameter than the plate '2), and theperipheral part of the latter is adapted to form with the adjacent faceof the former plate a narrow annular orifice it through which the vapourcan flow radially from the said chamber.

The vapourising tube is preferably of helical form, though it may be ofany other convenient shape and is adapted to extend into the combustionchamber 2', the supply-end of the tube being preferably arranged toextend rearwardly to and through an air duct 9' at the rear end of thecombustion chamber. The combustion chamber 1' and air duct 9' aresurrounded by an air jacket 70 terminating in an air supply pipe m fromwhich both the jacket k and the duct 7' are fed with air from a bloweror other source.

The plate d above mentioned which carries the nozzle has secured to it abell-shaped shield 0 which at its larger end surrounds the nozzle, andwhich lies within the duct 9' which is of truncatedconical form. Thispart 9' serves to direct air into the air jacket, and the air enteringthe part a is divided by the part 0 into two concentric streams. Theinner stream flows through the part c and plate at to the region aroundthe nozzle, and the outer stream flows to the peripheral region of thecombustion region where it meets with air which enters the said regionfrom the jacket through perforations as 10.

By this invention an efficient burner can be provided in a very simpleand robust form.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. A liquid fuel burner comprising in combination a nozzle formed by apair of coaxially arranged metal plates and having an annular dischargeorifice between the peripheral portions of said plates, a supportingshank on and extending axially from one side of one of said plates, ahollow boss on and extending axially from the other side of the lastmentioned plate through the other plate which is carried by said boss,and a vaporising tube secured at one end to said hollow boss.

2. Liquid fuel combustion apparatus comprising in combination acombustion chamber, a burner nozzle arranged at one end of said chamber,said nozzle being formed by a pair of coaxially arranged metal platesand having an annular discharge orifice between the peripheral portionsof said plates, a supporting shank on and extending axially from oneside of one of said plates, a hollow boss on and extending axially fromthe other side of the last mentioned plate through the other plate whichis carried by said boss, a perforated support to which said shank issecured and which is mounted in said combustion chamber, a vaporisingtube secured at one end to said boss and extending into the combustionregion of said chamber, an air duct leading to the end of said chamberadjacent to said nozzle, and an annular partition carried by saidsupport and dividing said duct into two concentric parts, one of saidparts leading to the region occupied by the nozzle, and the other ofsaid parts leading into the peripheral portion of said chamber.

JOHN STANLEY CLARKE.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 773,383 Friedmann et a1. Oct. 25, 1904 1,305,679 Yost June 3,1919 1,521,485 Stone Dec. 30, 1924 2,460,451 Farrell Feb. 1, 19492,471,892 Price May 31, 1949 2,532,711 Goddard Dec. 5, 1950 2,583,416Clarke et a1 Jan. 22, 1952

